TMSS-1218: Add parsets to SIPs and refer to the primary observation subtask as ObservationID (former 'SAS VIC Tree Id')

TMSS-1138: Add target to COBALT TAB specification, have COBALT provide the TAB and SAP targets in the feedback, and parse this feedback in TMSS. Also, write the new TAB targets into the HDF5 metadata

TMSS-1216: we foresee more problems when draft can be NULL, then when we enforce the link to stay which guarentees that we can follow the path_to_project for blueprints

TMSS-1144: skip non-finished and/or obsolete subtasks, as they are not part of the successfull provenance chain

TMSS-1124: added missing TaskTemplateExtendedSerializer for specifications_template of TaskDraftExtendedSerializer

TMSS-1124: using first is ok according to !633 (comment 24581)

TMSS-1124: create a subtask_output per task_connector_type of the task, but only with role Correlator or Beamformer because that is what observations produce

TMSS-1124: fetch the subtask's input/output dataproducts and all related properties in one queryset. Major speedup

TMSS-1124: use newly implemented SubtaskInput/Output to filter and connect the correct dataproducts between subtasks